CN106545024A - Height bleeds back the method for blocking of precipitation deep-well - Google Patents
Height bleeds back the method for blocking of precipitation deep-well Download PDFInfo
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- CN106545024A CN106545024A CN201510610246.5A CN201510610246A CN106545024A CN 106545024 A CN106545024 A CN 106545024A CN 201510610246 A CN201510610246 A CN 201510610246A CN 106545024 A CN106545024 A CN 106545024A
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Abstract
The present invention relates to the drying meanss field of underground foundation location or other areas, specially a kind of high method for blocking for bleeding back precipitation deep-well are kept by lowering of watertable.A kind of high method for blocking for bleeding back precipitation deep-well, is characterized in that：Implement successively as follows：A. precipitation；B. sealing；C. pour；D. conserve.Present invention closure stagnant water effect is good, and easy to operate, expense is low, high working efficiency.
Description
Technical field
The present invention relates to the drying meanss field of underground foundation location or other areas, specially a kind of high method for blocking for bleeding back precipitation deep-well are kept by lowering of watertable.
Background technology
In architectural engineering, many engineerings are all riverine, coastal and build, or multiaspect is near river course, cause that the construction area water yield is abundant, water level is higher.For this engineering in general is excavated using side, the method for side precipitation is constructed, and well depth is typically in 30m～50m.After main body construction is finished, precipitation must be blocked with well using plugging technology, typically adopt concreting technique, but now construction area water level is often far below periphery water level, once precipitation stops, then periphery subsoil water is bled back in well in a large number, bleeds back speed in 1.2m3/ s～2.1m3/ s or so.Cause concrete normally cannot pour, the problems such as not enough, the shut-in well concrete surface that pours rear presetting period produces a large amount of cracks, cause to cause whole base plate drift sand, piping or float etc. significant problem, or even form total destruction.
The content of the invention
In order to overcome the defect of prior art, there is provided one kind is easy to operate, block thoroughly drying meanss, the invention discloses a kind of high method for blocking for bleeding back precipitation deep-well.
The present invention reaches goal of the invention by following technical solution：
A kind of high method for blocking for bleeding back precipitation deep-well, is characterized in that：Implement successively as follows：A. immersible pump or sewage pump are used persistently to precipitation deep-well pumping as dewatering measure, by water lev el control stable away from below well head 1.5m；
B. in the well casing of precipitation deep-well filling level with good sand material as measures of preventing water, 0.6m/hour below is reduced to away from below well head 1.5m, making subsoil water bleed back speed by water lev el control stable；
C. with rapid hardening, the concreting of impervious, microdilatancy to pipe top；
D. conserve.
Described height bleeds back the method for blocking of precipitation deep-well, it is characterized in that：
During step a, the diving pump power of selection is 10kw～15kw, flow 15m3/ hour～20m3/ hour, lift are not less than 100m；From sewage pump discharge 50m3/ hour～80m3/ hour, lift are not less than 20m；
During step b, with good sand material, cobble-stone diameter is 50mm～66mm for the level of selection, and sand particle diameter is 2.3mm～3.1mm, mixing time 20min～40min；The proportioning of sand material is：If the quality of quick hardening cement is a, then stone quality is 1.5a～2a, and sand quality is 2a～3a；
During step c, from rapid hardening, impervious, microdilatancy concrete, the solidification control indexes of concrete are final set in initial set and 60min in 30min, and the impervious index of concrete is that the hydraulic pressure for bearing is not less than 0.8MPa, and the microdilatancy index of concrete is cubical expansivity 0.03%～0.05%；Placement layer by layer is adopted when pouring, per thickness degree in 200mm～300mm, while coordinate vibrating spear to vibrate, with pouring with vibrating, it is ensured that concrete it is closely knit, make concrete surface honeycomb play sand coarse aggregate ratio and control within 6 ‰；
During step d, maintenance method is watered natural curing or the maintenance of artificial heating and moistening from covering, and the moistening of concrete during natural curing, in concrete surface cover film and gunnysack, is kept by the way of watering；During nourishment, external heat source is utilized on concrete surface（Such as iodine-tungsten lamp, coal dust ball stove etc.）And the concrete sprinkled water to newly pouring carries out heating and moistening maintenance.
The invention has the beneficial effects as follows：1. it is good that stagnant water effect is blocked；2. easy to operate, generalization is strong；3. low compared with traditional method expense, and improve；4. speed is blocked, the duration is saved and is improved construction safety degree.
Description of the drawings
Fig. 1 is the flow chart of the present invention.
Specific embodiment
The present invention is further illustrated below by way of specific embodiment.
Embodiment 1
A kind of high method for blocking for bleeding back precipitation deep-well, as shown in Figure 1：Implement successively as follows：
A. immersible pump or sewage pump are used persistently to precipitation deep-well pumping as dewatering measure, by water lev el control stable away from below well head 1.5m：
From immersible pump be 150QJ20-156 types, power of motor 15kw, efficiency 64%, flow 20m3/ hour, lift 156m, rotating speed 2850r/min, connection form adopt shaft coupling direct connection, rated voltage 380V, frequency 50hz, rated current 35.62A, 21 grades of impeller progression, 2 cun of outlet diameter；
From sewage pump be 80PW types, impeller suction be single-suction, flow 80m3/ hour, lift 26m；
B. in the well casing of precipitation deep-well filling level with good sand material as measures of preventing water, 0.6m/hour below is reduced to away from below well head 1.5m, making subsoil water bleed back speed by water lev el control stable：
From level with good sand material, cobble-stone diameter is 50mm～66mm, and sand particle diameter is 2.3mm～3.1mm, mixing time 30min；The proportioning of sand material is：Quick hardening cement quality 400kg, stone quality 725kg, sand quality 1043kg；
C. with rapid hardening, the concreting of impervious, microdilatancy to pipe top：
From rapid hardening, impervious, microdilatancy concrete, the solidification control indexes of concrete are final set in initial set and 60min in 30min, and the seepage-resistant grade of concrete is《50164 Standard for quality control of concrete of GB》The P8 levels of defined, that is, the hydraulic pressure for bearing are not less than 0.8MPa, and the microdilatancy index of concrete is cubical expansivity 0.03%～0.05%；Placement layer by layer is adopted when pouring, per thickness degree in 250mm, while coordinate vibrating spear to vibrate, with pouring with vibrating, it is ensured that concrete it is closely knit, make concrete surface honeycomb play sand coarse aggregate ratio and control within 6 ‰；
D. conserve：
Maintenance method is watered natural curing or the maintenance of artificial heating and moistening from covering, and the moistening of concrete during natural curing, in concrete surface cover film and gunnysack, is kept by the way of watering；During nourishment, external heat source is utilized on concrete surface（Iodine-tungsten lamp, coal dust ball stove etc.）And the concrete sprinkled water to newly pouring carries out heating and moistening maintenance.
Claims (2)
1. a kind of high method for blocking for bleeding back precipitation deep-well, is characterized in that：Implement successively as follows：A. immersible pump or sewage pump are used persistently to precipitation deep-well pumping as dewatering measure, by water lev el control stable away from below well head 1.5m；
B. in the well casing of precipitation deep-well filling level with good sand material as measures of preventing water, 0.6m/hour below is reduced to away from below well head 1.5m, making subsoil water bleed back speed by water lev el control stable；
C. with rapid hardening, the concreting of impervious, microdilatancy to pipe top；
D. conserve.
2. height as claimed in claim 1 bleeds back the method for blocking of precipitation deep-well, it is characterized in that：
During step a, the diving pump power of selection is 10kw～15kw, flow 15m3/ hour～20m3/ hour, lift are not less than 100m；From sewage pump discharge 50m3/ hour～80m3/ hour, lift are not less than 20m；
During step b, with good sand material, cobble-stone diameter is 50mm～66mm for the level of selection, and sand particle diameter is 2.3mm～3.1mm, mixing time 20min～40min；The proportioning of sand material is：If the quality of quick hardening cement is a, then stone quality is 1.5a～2a, and sand quality is 2a～3a；
During step c, from rapid hardening, impervious, microdilatancy concrete, the solidification control indexes of concrete are final set in initial set and 60min in 30min, and the impervious index of concrete is that the hydraulic pressure for bearing is not less than 0.8MPa, and the microdilatancy index of concrete is cubical expansivity 0.03%～0.05%；Placement layer by layer is adopted when pouring, per thickness degree in 200mm～300mm, while coordinate vibrating spear to vibrate, with pouring with vibrating, it is ensured that concrete it is closely knit, make concrete surface honeycomb play sand coarse aggregate ratio and control within 6 ‰；
During step d, maintenance method is watered natural curing or the maintenance of artificial heating and moistening from covering, and the moistening of concrete during natural curing, in concrete surface cover film and gunnysack, is kept by the way of watering；During nourishment, on concrete surface using external heat source and to sprinkle water and heating and moistening maintenance is carried out to the concrete that newly pours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510610246.5A CN106545024B (en) | 2015-09-23 | 2015-09-23 | Plugging method for high-rewet precipitation deep well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510610246.5A CN106545024B (en) | 2015-09-23 | 2015-09-23 | Plugging method for high-rewet precipitation deep well |
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| CN106545024A true CN106545024A (en) | 2017-03-29 |
| CN106545024B CN106545024B (en) | 2020-11-03 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202450536U (en) * | 2011-12-29 | 2012-09-26 | 青岛新华友建工集团股份有限公司 | Shallow dewatering and plugging construction device in foundation pit |
| RU2011110670A (en) * | 2011-03-21 | 2012-09-27 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Северный (Арктический) фед | WAY OF EXTINGUISHING A WELL OF A Fountain OF A FUEL FROM A WELL |
| CN102776897A (en) * | 2012-08-21 | 2012-11-14 | 庆阳华晨建筑安装工程有限公司 | Wash apron anti-settling anti-cracking construction method and structure |
| CN103993615A (en) * | 2014-05-20 | 2014-08-20 | 中国建筑第二工程局有限公司 | Plugging structure for large-drawdown pipe well and construction method thereof |
-
2015
- 2015-09-23 CN CN201510610246.5A patent/CN106545024B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2011110670A (en) * | 2011-03-21 | 2012-09-27 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Северный (Арктический) фед | WAY OF EXTINGUISHING A WELL OF A Fountain OF A FUEL FROM A WELL |
| CN202450536U (en) * | 2011-12-29 | 2012-09-26 | 青岛新华友建工集团股份有限公司 | Shallow dewatering and plugging construction device in foundation pit |
| CN102776897A (en) * | 2012-08-21 | 2012-11-14 | 庆阳华晨建筑安装工程有限公司 | Wash apron anti-settling anti-cracking construction method and structure |
| CN103993615A (en) * | 2014-05-20 | 2014-08-20 | 中国建筑第二工程局有限公司 | Plugging structure for large-drawdown pipe well and construction method thereof |
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| CN106545024B (en) | 2020-11-03 |
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